N-Heterocyclic Carbene Catalyzed Domino Cyclization of Propargylic Alcohols and Benzoyl Isocyanates

N-Hetereocyclic carbenes (NHCs) were found to be efficient catalysts for the cyclization of propargylic alcohols and isocyanates. Domino cyclization reactions were carried out using isopropyl-substituted imidazolium salt as a precatalyst, and a wide range of substituted oxazolidinones were obtained in high yields.